Overview
The INA199A3DCKR is a 26-V common-mode, zero-drift topology, current-sensing amplifier produced by Texas Instruments. This device is designed to accurately measure voltages developed across a current-sensing resistor in both low-side and high-side configurations. It can operate with input voltage rails as high as 26 V and can be powered from supply voltages as low as 2.7 V. The zero-drift architecture ensures high-precision measurements with a maximum input offset voltage of ±150 µV and a temperature drift of 0.5 µV/°C over the full temperature range of –40°C to +125°C.
Key Specifications
| Specification | Value |
|---|---|
| Common-Mode Range | –0.3 V to 26 V |
| Offset Voltage (Maximum) | ±150 µV |
| Gain Error (Maximum Over Temperature) | ±1% (C Version), ±1.5% (A and B Versions) |
| Offset Drift (Maximum) | 0.5 µV/°C |
| Gain Drift (Maximum) | 10 ppm/°C |
| Gain Options | 50 V/V, 100 V/V, 200 V/V (INA199A3: 200 V/V) |
| Quiescent Current (Maximum) | 100 µA |
| Operating Temperature Range | –40°C to 125°C |
| Supply Voltage Range | 2.7 V to 26 V |
| Package Type | 6-Pin SC70 (DCK) |
| Slew Rate | 0.4 V/μs |
| Voltage Noise Density | 25 nV/√Hz |
Key Features
- Wide Common-Mode Range: –0.3 V to 26 V, allowing for accurate measurements in a variety of applications.
- Low Offset Voltage: ±150 µV (Maximum), enabling precise current sensing with shunt drops as low as 10-mV full-scale.
- High Accuracy: Gain error of ±1% (C Version) and ±1.5% (A and B Versions) over temperature, with minimal offset and gain drift.
- Multiple Gain Options: Available in 50 V/V, 100 V/V, and 200 V/V configurations, providing flexibility in different applications.
- Low Power Consumption: Maximum quiescent current of 100 µA, making it suitable for power-sensitive designs.
- Compact Packaging: Available in 6-Pin SC70 and 10-Pin UQFN packages, ideal for space-constrained applications.
Applications
- Overcurrent Protection: Used in systems requiring precise current monitoring to prevent overcurrent conditions.
- Precision Current Measurement: Ideal for system optimization and monitoring in various industrial and automotive applications.
- Closed-Loop Feedback Circuits: Utilized in feedback loops to maintain precise control over current levels.
- Automotive Systems: Suitable for use in automotive systems due to its wide operating temperature range and high accuracy.
- Industrial Automation: Used in industrial automation for accurate current sensing and control.
Q & A
- What is the common-mode range of the INA199A3DCKR?
The common-mode range is from –0.3 V to 26 V.
- What is the maximum offset voltage of the INA199A3DCKR?
The maximum offset voltage is ±150 µV.
- What are the available gain options for the INA199 series?
The available gain options are 50 V/V, 100 V/V, and 200 V/V. The INA199A3 specifically has a gain of 200 V/V.
- What is the operating temperature range of the INA199A3DCKR?
The operating temperature range is from –40°C to 125°C.
- What is the supply voltage range for the INA199A3DCKR?
The supply voltage range is from 2.7 V to 26 V.
- What is the maximum quiescent current of the INA199A3DCKR?
The maximum quiescent current is 100 µA.
- In what packages is the INA199A3DCKR available?
The INA199A3DCKR is available in a 6-Pin SC70 package.
- What is the slew rate of the INA199A3DCKR?
The slew rate is 0.4 V/μs.
- What are some typical applications of the INA199A3DCKR?
Typical applications include overcurrent protection, precision current measurement, and closed-loop feedback circuits.
- How does the zero-drift topology benefit the performance of the INA199A3DCKR?
The zero-drift topology ensures high-precision measurements by minimizing offset voltage and drift over temperature, allowing for accurate current sensing even with low shunt drops.
